TS–005 Capacity of volume measures for testing liquid measuring instruments at maximum flowrate

Scope

To provide instruction on the capacity of standard volume measure used for testing liquid measuring instruments at maximum flowrate.

Reference documents

Policy

The capacity of a Working Standard volume measure required to be used for the verification and inspection testing of liquid measuring instruments.

Table 1

Instrument categoryMaximum flowrateCapacity of volume measure
  (Maximum flowrate means maximum achievable flowrate) (for testing at maximum flowrate)
Fixed fuel dispensers, e.g. driveway flowmeters and truck stops Less than or equal to 60 L/min

Whichever is greater:

  • Use a measure of at least 20 L; or
  • Use a measure suitable to hold a delivery of at least “3 x approved Minimum Measured Quantity (Vmin)”.
Greater than 60 L/min A volume measure suitable to hold a product delivered for at least 1 minute at maximum achievable flowrate.

Table 2

Instrument categoryMaximum approved flowrateCapacity of volume measure
  (Maximum flowrate as detailed on the approval certificate) (for testing at maximum flowrate)
Liquid measuring instruments, e.g. meters on delivery vehicles (tankers) bulk flowmetering system, milk measuring systems, adblue dispenser etc. Less than or equal to 60 L/min

Whichever is greater:

  • Use a measure of at least 10 L; or
  • Use a measure suitable to hold a delivery of at least “3 x approved Minimum Measured Quantity (Vmin)”.
Greater than 60 L/min A volume measure suitable to hold the product delivered for at least 1 minute at maximum approved flowrate (Qmax); plus an allowance for ramp up and ramp down volume.

Trade Measurement — Technical Policy

Policy number:TS - 005
Effective date: April 2017
Version number: 3
Policy name: Capacity of volume measures for testing liquid measuring instruments at maximum flowrate
Reviewed by: Davis White, Legal Metrology Advisor and Senior Trading Standards Officer
Approved by: Phil Sorrell, Team Leader Compliance and Inspection